Personally I thinks its another Govt FU and solar companies are making a killing at our expense
eg: a 1.5 kw system will cost you around $3000 after subsidies but an avaerage househould uses more than that a day so it'll take a long time to recoup your capital investment however to make it worth your while you'll need at least a 3 kw system which will cost you around $10000, nearly three times more, go figure
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